USB Audio settings base on ADK3.0
1. xIDE
   - Transport: BCSP -> USB VM
   - Enable USB
   - Enable USB audio
2. PSTool
   - Host interface 
   - vm app will supply USB descriptor -> True
   - USB product id
   - USB product string
   - USB serial number
   - USB vendor id
3. ConfigTool
   - class of device -> Speaker Audio
   - USB Plug-in Index: 1-Mic CVC
4. Sound
   - set as default device